1258 is now being weird

[Jnunu1]

Ok. So i got a voltage cap for my speky rx as per my previous thread. Plugged it all in and now the servo works with no obvious glitching.
BUT when the servo moves is makes a horrible statticy sort of noise ane if i leave the epa at 100 when i turn the wheel the servo makes a high pitched whine at its end point. This goes when i turn down the epa to 75-85.

Is any of this normal? First time with a"proper" servo btw.

John